<!DOCTYPE html>
<html>
<head>
    <title>课程封面上传</title>
    {% include 'admin/common/header.html' %}
</head>
<body class="pear-container">
<div class="layui-row layui-col-space15">
    <div class="layui-col-xs9">
        <div style="height:325px;background-color: rgb(247, 247, 247);">
            <img id="sourceImage" src="">
        </div>
    </div>
    <div class="layui-col-xs3" style="padding-left:0px;">
        <div id="previewImage"
             style="width:210px;height:210px;border: 1px solid rgb(200, 200, 200);border-radius: 50%;overflow:hidden;">
        </div>
    </div>
</div>
<div class="layui-row">
    <div class="layui-form-item">
        <div class="layui-input-inline layui-btn-container" style="width: auto;vertical-align:top;">
            <button class="pear-btn pear-btn-sm pear-btn-primary layui-icon layui-icon-left" cropper-event="rotate"
                    data-option="-15" title="左旋15°"></button>
            <button class="pear-btn pear-btn-sm pear-btn-primary layui-icon layui-icon-right" cropper-event="rotate"
                    data-option="15" title="右旋15°"></button>
            <button class="pear-btn pear-btn-sm pear-btn-danger layui-icon layui-icon-refresh" cropper-event="reset"
                    title="重置"></button>
            <label for="uploadPicture" class="pear-btn pear-btn-sm pear-btn-primary layui-icon layui-icon-upload"
                   title="选择图片"></label>
            <input class="layui-upload-file" id="uploadPicture" type="file" value="选择图片">
        </div>
        <div class="layui-form-mid layui-word-aux">建议:图片的尺寸宽高比为1:1,大小在5m以内。</div>
    </div>
</div>
</body>
{% include 'admin/common/footer.html' %}
<script>
    layui.use(['jquery', 'layer', 'cropper', 'popup'], function () {
        let $ = layui.jquery
        let layer = layui.layer
        let cropper = layui.cropper
        let popup = layui.popup

        let options = {
            aspectRatio: 1 / 1, // 裁剪框比例
            preview: '#previewImage', // 预览div
            viewmode: 1
        }

        $('#sourceImage').attr('src', parent.layui.$('#course_icon').attr('src'))
        $('#sourceImage').cropper(options)

        window.submitForm = function () {
            $('#sourceImage').crossOrigin = 'anonymous'//解决跨域图片问题
            $('#sourceImage').cropper('getCroppedCanvas', {
                width: 280,
                height: 140
            }).toBlob(function (blob) {
                let timeStamp = Date.parse(new Date())
                let fileName = timeStamp + '.jpg'
                let formData = new FormData()
                formData.append('file', blob, fileName)
                formData.append('fileName', fileName)
                formData.append('fileToken', timeStamp)
                $.ajax({
                    method: 'post',
                    url: '/admin/file/icons/upload', //用于文件上传的服务器端请求地址
                    data: formData,
                    processData: false,
                    contentType: false,
                    success: function (result) {
                        if (result.success) {
                            parent.layui.$('#course_icon').attr('src', result.data.src)
                            parent.layer.close(parent.layer.getFrameIndex(window.name))
                        } else {
                            popup.failure('上传失败')
                        }
                    }
                })
            })
        }

        $('.pear-btn').on('click', function () {
            let event = $(this).attr('cropper-event')
            if (event === 'rotate') {
                let option = $(this).attr('data-option')
                $('#sourceImage').cropper('rotate', option)
            } else if (event === 'reset') {
                $('#sourceImage').cropper('reset')
            }
            $('#uploadPicture').change(function () {
                let r = new FileReader()
                let f = this.files[0]
                let uploadFileSize = f.size / 1024
                if (uploadFileSize > 5120) {
                    parent.layer.msg('上传文件不得超过5m', {icon: 5})
                    return false
                }
                r.readAsDataURL(f)
                r.onload = function (e) {
                    $('#sourceImage')
                        .cropper('destroy')
                        .attr('src', this.result)
                        .cropper(options)
                }
            })
        })
    })
</script>